26 176: (у*56-45 856)=409
у*56-45 856=26 176: 409
у*56-45 856=64
у*56=64+45 856
у*56=45 920
у=45 920: 56
у=820
26 176: (у*56-45 856)=409
у*56-45 856=26 176: 409
у*56-45 856=64
у*56=64+45 856
у*56=45 920
у=45 920: 56
у=820